Creeping traverse for rayon pot spinning machines



Feb. 12, 1957 J. J. SIPPEL El' AL CREEPING TRAVERSE FOR RAYON POT sPINNxNG MACHINES 4 shee'ts-Sneet 1 Filed Aug. 29, 1951 Feb., 12, 1957 J. J. slPPL-:L E1' AL 2,780,907

CREEPING TRAVERSE FOR RAYON POT SPINNING MACHINES Filed Aug. 29 1951 4'SheebS-Sheet 2 Feb. 12, 1957 J, J, slPPEL Er AL 2,780,907

CREEPING'TRAVERSE FOR RAYON POT SPINNING MACHINES Filed Aug. 29, 1951 4 Sheets-'Sheet 3 Feb. 12, 1957 l J. J. slPPEL ET AL 2,780,907

OREEPING 'IRAVERSE FOR RAYON POT SPINNING MACHINES WMA/917 KHE/VM Joy/v L/ .53 FFFA.

CREEPING TRAVERSE FOR RAYN POT SPINNENG MACHINES John l. Sippel, Drexel Hill, Pa., and William Kernan,

Utica, N. Y., assignors to Skenandoa Rayon Corporation, Utica N. Y., a corporation of Delaware Application August 29, 1951, Serial No. 244,218

Claims. (Cl. 57-77) This invention relates to improvements in rayon pot spinning machines and more particularly to improvements in the traverse systems of such machines.

A primary object of the invention is to provide a generally improved traverse system for machines of this type, said system affording cakes of substantially uniform thickness and density and substantially free from the undesirable band or ribbon effects caused by exact superimposition of successive convolutions of thread.

The invention resides also in certain structural and mechanical details hereinafter described and illust-rated in the attached drawings wherein:

Fig. 1 is a vertical sectional view of a spinning machine made in accordance with the invention;

Fig. 2 is a section on the line 2 2, Fig, l;

Fig. 3 is a fragmentary top plan view of the machine;

Fig. 4 is a side elevational view of the portion o-f the machine illustrated in Fig. 3;

Fig. 5 is a fragmentary sectional View on the line 5 5, Fig. 3;

Fig. 6 is an enlarged front elevational view of an upper portion of the machine;

Fig. 7 is a sectional view on the line 7 7, Fig. 6;

Fig. 8 is a fragmentary elevational View partly in section illustrating a detail, and

Fig. 9 is a sectional View on the line 9 9, Fig. 7.

With reference to the drawings, 1l) is the main frame of a spinning machine of the type to which the present invention relates. The frame supports the conventional .spinning elements including a spinning pump 11, a spinning bath 12, a pot 13, and its motor 14. ln the present instance, and in accordance with the usual practice, the elements 11, 12, 13 ad 14 are duplicated at the opposite sides of the frame 10, and the pump, spinning bath, pot and motor at the opposite side of the frame from the aforesaid elements are identiied respectively by the reference numerals 15, 16, 17 and 18. v

Mounted for vertical reciprocation in the upper portion 19 of the frame lll, is a traverse rod 21, this rod having secured to its lower end the usual traverse rail bracket 22 which carries the traverse rails 23 and 24. It will be understood that the rod 21 is one of a pair, located respectively at the ends of the machine, which jointly constitute the support for the said rails. Secured to the rails 23 and 24 for operative association respectively with the pots 13 and 17, are the usual funnels 25 and 26, these funnels being supported in the present instance on arms 27 and 2S which, as shown in Fig. l, support the funnels in operative position with respect to the pots 13 and 17 and which provide for elevation of the funnels above and to one side of the pots as illustrated in broken lines in Fig. 1. Supported on the frame 19 in positions overlying the pots 13 and 17 respectively, are godet wheels 29 and 31 which function in well known manner to feed the rayon filaments from the baths 12 and 16 to the tunnels. Insofar as described, the machine may be considered conventional, and is of the general form of that disclosed in U. S. Patent No.- 2,072,023, dated February 23, 1937.

In accordance with the present invention, the rod 21 has clamped to the upper part thereof a block-like member 32 and projecting from one side thereof is a cylindrical pin 33. Pivotally engaged with this pin is a connetting rod A34 which is pivotally attached at its upper end to an arm 35 secured to a rock shaft 37 journaled in the upper pam of the frame. Another arm 38 on the shaft 37 extends upwardly and is pivotally connected by means hereinafter described to one end 39 of a yoke 41, the opposite end 42 of the yoke being pivotally supported at the upper end of an arm 43 corresponding to the arm 3S and secured to a second rock shaft 44 journaled in the opposite side of the frame 19 from the shaft 37. The yoke 42 is operatively connected to a traverse unit supported in a housing 45 in the top of the frame, said unit being generally of the character of that disclosed in U. S. Patent No. 1, 968,026, dated July 3l, 1934, and including a -driven terminal shaft 46 which projects through the housing wall and which carries at its outer end a crank pin 47. The pin 47 is fitted into a block 48, see Fig. 5, which is slidably supported in a slot 49 in the yoke 41. In the present instance the pin 47 is itself carried by a block 51 mounted slidably in a slot 52 in the face of a flange 53 at the end of the shaft 46. The block 51 has a threaded bore which is engaged by a threaded stem 54 rotatably supported in the flange S3 and extending longitudinally through the slot 52. Rotation of the stem S4 will effect a radial adjustment of the block 51 in the flange 53 with respect to the axis of the shaft 46 and will thereby correspondingly adjust the throw of the crank pin 47.

With this arrangement, rotation of the shaft 46 (from a source of power not shown) will effect a transverse reciprocation or oscillation of the yoke 41, th-e extent of the transverse movement of the yoke being determined by the setting of the crank pin 47. AIn this movement of the yoke the arms 33 and 43 upon which the yoke is supported will be caused to oscillate through an arc corresponding to the transverse movement of the yoke.r This oscillation of the arms 38 and 43 will be transmitted to `the shafts 37 and 44, and through the arm 35 and c0nnecting rod 34 t0 the traverse rod 21, causing a vertical reciprocation of the latter.

With reference to Figs. 6 and 7 it will be noted that the arrn 3S carries at its upper end a pin 55, said pin having at its forward end a cylindrical eccentric portion 56 from which is suspended the end 39 of yoke 41. yOn the opposite end of the pin 55 is journaled a member 57 from which depends a gear segment 58, and the member 57 extends above the pin 55 and has secured in the upper end thereof a pin 59 which projects beyond the forward face of the member and forms a pivotal support for a pawl 61. This pawl is in operative association with a ratchet wheel 62 keyed to the pin 55. As shown in Fig. 6, the gear segment S8 meshes with a segment 63 which is supported on an arm 64 secured to the frame 19.

A corresponding pin 65 with eccentric terminal end 6@ operatively connects the other end 42 of the yoke 41 to the arm 43 and to a gear segment 66, said segment meshing with a xed segment 67 corresponding to the segment 63 previously described. A pawl 658 is associated with the segment 66, as described above, and coacts with a ratchet wheel 69 secured to the pin 65. With this device, oscillation of the yoke 41 will cause oscillation on the pins 55 and 65 of the gear segments 58 and 66 and will thereby oscillate the pawls 61 and 68 with respect to the ratchet wheels 62 and 69 so as to effect intermittent rotation of the said wheels and of the pins 5S and 65. With 4the particular arrangement shown in the drawings, the rotational movements of the pins 55 and 65 will be in the opposite directions but at the same rate.

With reference to Fig. 8, which illustrates the coaction of the pawl 6K8 with its ratchet 69, it will be noted that the arm 43 has at its upper end a lug 71 to the outer end of which is secured by means of screws 73 an arcuate plate 72. The screws pass through a slot 74 in the plate so that the plate may be adjusted circumferentially of the sprocket wheel 69 which it overlies. The plate 72 is positioned in the path of the pawl 63 Vso that on the retractive movement of the pawl the point thereof will ride up over the top of the plate and will thereby be prevented from contacting the teeth of the ratchet wheel 69, during a predetermined part of the subsequent advance movement and until the pawl will have progressed to the point where it clears the end of the plate. By adjustment of the plate 72, the extent of the rotative movement of the ratchet wheel 69 at each forward movement of the pawl 68 may be regulated to thereby correspondingly regulate the angular extent of each of the intermittent movements of the pin 65 which result from the angular displacements of the ratchet wheel. A corresponding adjustable guard plate 75 is operatively associated with the pawl 61 and ratchet wheel 62.

At each rcciprocation of the yoke 41, therefore, the pins 5S and 65 will receive a slight angular displacement in the arms 38 and 43, and since the portions of the pin to which the arms are connected, are eccentric to the portions 56 and 60 which support the yoke 41, the aforesaid angular displacements result in a relative displacement of the arms and the yoke at the points of connection. In effect, the upper ends of the arms 38 and 43 will creep back and forth in the horizontal direction with respect to the ends of the yoke to an overall extent corresponding to the eccentricity of the two parts of the pins, the creep occurring in increments corresponding to the incremental angular adjustments of the ratchet wheels, under action of the pawls. In the present instance, assuming an angular advance of one tooth of the ratchet wheel at each reciprocation of the yoke, the said creeping movement would cover a complete cycle in each thirty-one full reciprocations of the yoke.

This gradual relative adjustment between the yoke 41 and arms 38 and 43 results in an intermittent progressive variation in the oscillations of the shafts 37 and 44. Instead of moving over a xed arc, the arc of travel will shift progressively and in small increments first inV one 'direction and then in the other, the cycle of change being completed in each thirty-,one reciprocations of the yoke. A corresponding cyclic variation will occur in the vertical movements of the traverse rods 31, rails 23, 24 and cones 25, 26and consequently in the lower terminal ends of the latter from which the yarn is directed to the cake. This progressive variation Vin the points of termination of the traverse precludes the bandY effects referred to above and distributes the yarn in successive convolutions in a manner affording a cake of substantially uniform Wall thickness and density with open Wind well suited for subsequent Washing and treatingoperations.

We claim: v

l. A traverse motion for rayon pot spinning machines comprising a yoke having a slot me'dially thereof to re,- ceive a crank pin, means for rotating said crank pin whereby reciprocating motion is'imparted'to said yoke, a pair of rocker arms, a pair of pins, one of said pins mounted on one of said rocker arms, and the other of Y said pins mounted on the other of said rocker arms, said pins each having an eccentric portion, one end of said yoke being mounted on the eccentric portion of oneY of said pins and the other'end of said yoke being mounted on the eccentric portion of the other of sai-d pins, means for imparting stepwise rotation to said pins as said yoke is reciprocated whereby the axes of said pins upon which Y 4 Y the ends of said yoke are mounted are displaced in recui-ring cycles, and means for translating the oscillating movement of said rocker arms into vertical reciprocating movement of a series of pot spinning funnels.

2. in a traverse motion for rayon pot spinning machines, the combination of a reciprocatory driving member, an oscillatory driven member, a pivotal connection for said members, said pivotal connection including a pin having an eccentric portion, a traverse mechanism for feeding rayon yarn to the rayon pot, means for connecting said traverse mechanism to said oscillatory driven member, and means for rotating the eccentric portion of said pin so that the pivot axis Vof said reciprocatory driving member is incrementally displaced relative to the pivotal axis of said driven member in a predetermined cycle so that the rayon yarn is fed to the rayon pct without the exact superimposition of successive convolutions of yarn in the cake formed in the rayon pot.

3. A traverse motion for rayon pot spinning machines, comprising in combination a reciprocatory driving member, an oscillatory driven member, a pivotal connection for said members, means for displacing the axis of said pivotal connection whereby the pivot point of said reciprocatory driving member is incrementally displaced relative to the pivotal axis of said driven member in a predetermined cycle, said means comprising a pivot pin rotatably mounted in one of said members and having an eccentric portion pivotally engaged with the other of said members, a segmental gear element pivotally supported on said pin, a fixed segmental gear concentric with the oscillatory center of said driven member in mesh engagement with said rst mentioned segmental gear whereby oscillation of said driven member results in rocking movements of the rst named gear element on said pin, and means for operatively connecting the first named Y gear element to said pin, said connecting means including transmission elements for converting the said rocking movements of the said gear element on said pin into rotative Vmovements of the eccentric portion of saidpin. y

4. The mechanism as set forth in claim 3 further comprising pawl and ratchet elements connected to said pin so that rocking movement of said pivotally supported gear element effects a progressive rotary movement of said pin in one direction. f

5.' The mechanism as set forth in claim 2 further characterized in that said oscillatory driven member comprises an arm and a rock shaft.

6. In a traverse motion for rayon pot spinning machines, the combination of a reciprocatory driving member, of an oscillatory driven member, a pivotal connection for saidV members, a traverse mechanism for feeding rayon yarn to the rayon pot, means for connecting said traverse mechanism to said oscillatory driven member, means for displacing the axis of said pivotal connection whereby the pivot point of said reciprocatory driving member is incrementally displaced relative lto the pivotal axis of said driven member in a predetermined cycle, said displacing means comprises a pivot pin rotatably mounted in said members, and having an eccentric portion in pivotal engagement with said driving member, and means for imparting incrementalrotational movement to said pivot pin so that the. rayon yarn isfed to the rayon pot without the exact superimposition of successive convolutions of yarn in the cake formed in the rayon pot.

7. A traverse motion as set forth in claim 6 wherein the means for imparting rotational movement to said pin comprises a ratchet wheel secured to said pin and a pawl pivotally attached to said driven member so as-to engage said ratchet and rotate same upon oscillation of said driven member,

8. ln a traverse motion for rayon pot spinning ma chnes, the combination of a reciprocatory driving member, an oscillatory driven means, said means comprlsing a pair of rock shafts and arms spaced apart and pivotal connections for supporting said driving member on said arms, said pivotal connections including a pair of pins cach having an eccentric portion, a traverse mechanism for feeding rayon yarn to the rayon pot, means for connecting said traverse mechanism to said oscillatory driven means, and means for rotating the eccentric portions of said pins so that the pivot axes of said reciprocatory driving member are incrementally displaced relative to the pivotal axes of said driven means in a predetermined cycle so that the rayon yarn is fed to the rayon pot without the exact superimposition of successive convolutions of yarn in the cake formed in the rayon pot.

9. The mechanism as set forth in claim 8 further characterized in that said driving member lconsists of a yoke having a crank pin-receiving slot substantially paralleling said arms.

10. The mechanism as set forth in `claim 9 further comprising additional arms for connecting said rock shafts to said traverse mechanism.

References Cited in the le of this patent UNITED STATES PATENTS 1,576,761 Hoffman Mar. 16, 1926 1,968,406 Lambeck July 31, 1934 2,364,714 Hivick Dec. 12, 1944 2,385,888 Sippel Oct. 2, 1945 2,489,882 Hartley Nov. 29, 1949 2,586,020 Fry Feb. 19, 1952 FOREIGN PATENTS 572,205 France Feb. 16, 1924 

